The implication of the prohibition of cupping for a fasting person due to weakness.
General Chapter
Al-Mughni
Book of Fasting
Primary text
If the rationale for prohibiting cupping for the fasting person is the fear of weakness, this necessitates a ruling of dislike (makruh) rather than outright nullification of the fast. The statement "The cupper and the one cupped have broken their fast" is interpreted by some as meaning they have approached nullification of the fast.
Supporting text
This interpretation that the prohibition merely implies dislike (makruh) or proximity to breaking the fast is considered a mere conjecture requiring proof. Furthermore, this interpretation is not applicable to the cupper, who does not experience the debilitating weakness cited as the reason for the prohibition.